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- W2809917228 abstract "The diffusivity of macromolecules in the cytoplasm of eukaryotic cells varies over orders of magnitude and dictates the kinetics of cellular processes. However, a general description that associates the Brownian or anomalous nature of intracellular diffusion to the architectural and biochemical properties of the cytoplasm has not been achieved. Here we measure the mobility of individual fluorescent nanoparticles in living mammalian cells to obtain a comprehensive analysis of cytoplasmic diffusion. We identify a correlation between tracer size, its biochemical nature and its mobility. Inert particles with size equal or below 50 nm behave as Brownian particles diffusing in a medium of low viscosity with negligible effects of molecular crowding. Increasing the strength of non-specific interactions of the nanoparticles within the cytoplasm gradually reduces their mobility and leads to subdiffusive behaviour. These experimental observations and the transition from Brownian to subdiffusive motion can be captured in a minimal phenomenological model. Nanoparticle diffusion in the cytoplasm of living cells strongly deviates from random motion. Single-particle tracking analysis show that this is due to non-specific interactions with intracellular components." @default.
- W2809917228 created "2018-07-10" @default.
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- W2809917228 date "2018-07-02" @default.
- W2809917228 modified "2023-10-18" @default.
- W2809917228 title "Non-specific interactions govern cytosolic diffusion of nanosized objects in mammalian cells" @default.
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- W2809917228 doi "https://doi.org/10.1038/s41563-018-0120-7" @default.
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